Compiling using VBCC (sys/types.h)

When I do small/simple programs I try to test it with VBCC too if it compiles and so.
When trying to compile this "version" clone with some "features", under GCC no problems, but when trying VBCC I get the following error "sys/types.h" not found.
Do I need to copy gcc "???" drawer into vbcc includes or do I need an external package (posixlib in os4depot)?

I don't think sys/types.h is in the GCC directory. It's in the newlib or clib2 includes. I don't know anything about vbcc but I'm guessing that the C library (clib2 or newlib?) includes are not in your vbcc include paths.